What is the maximum value of vant Hoff factor for Na2SO4.10H2O?

Van’t Hoff is the number of species formed by a compound on dissociation/association in aqueous medium.
Na2SO4.10H2O  dissociates in two Na+ ions, one SO42- ion, ten protons and ten hydroxyl ions.  
   Na2SO4.10H2 2 Na+ + SO42- + 10 H+ + 10 OH-  
So, van’t Hoff factor is sum of the total number of ions formed in dissociation, which is 23.       

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